Fuel-mixing apparatus



April 28, 1931. w. F. FENZEL 1,803,240

FUEL MIXING APPARATUS Filed Dec. 1, 1927 Patented Apr. 28, 1931 STATESWILLIAM FENZEL, F CLEVELAND, OHIO FUEL-MIXING APPARATUS Applicationfiled December 1, 1927. Serial No 237,057.

This invention relates to improvements in fuel treatment and supplyapparatus for internal combustion engines, and has as its essential andprimary object the increasing of the efiiciency of the motor.

A further object is the increasing of such efliciency with fuel of lowergrade or inferior quality.

Vith these and other and more detailed objects in View, as will in parthereinafter become apparent and in parts be stated, the inventioncomprises certain novel constructions, combinations, and arrangements ofparts as subsequently specified and claimed.

In the accompanying drawings- Figure 1 is a view in side elevation,somewhat diagrammatic, of an internal combustion motor equipped with anembodiment of the present invention.

Figure 2 is an enlarged, detail, sectional elevation of a structureembodying the features of the present invention.

Referring to the drawings by numerals, 1 indicates an internalCombustion motor of any well known or conventional type having the usualexhaust manifold 2 discharging into the exhaust pipe 3. The customaryintake manifold 4 communicates with the source of fuel supplyincorporating the features of the present invention. The details ofconnection between such fuel supply and the manifold 4 are susceptibleof a wide range of variance, as will become obvious. One specific formof such connections is illustrated in the drawings and comprises theusual clamping flanges 5 fixed, respectively, to the intake manifold andthe carburetor body or fuel supply. The carburetor flange in thestructure illustrated in the drawings is formed integral with, orotherwise fixed to, the throat or discharge tube 6 of the mixing chamber7. A throttle valve 8 is pivoted in the customary manner in the throat 6and provided with a clamp 9 and other linkage, not illustrated, for theusual carburetor throttle control. The mixing chamber 7 is preferablyglobular, but may be otherwise shaped, and is provided in 1ts upperportion with a spider 10 carry ng a pendent guiding pin 11 on which isslidlngly mounted a mixing and control valve 12. An

appropriately tensioned spring 13 is coiled about the upper portion ofthe valve 12 so as to rest at its lower end against the valve andcontact at its upper end against the spider 10, and thereby stress thevalve 12 downward to its seat. The under face of the valve 12 is formedcentrally into a pendent inverted cone 14 which flares upwardly andblends into the body of the valve 12 with an encircling depression 15formed in the under face of the valve at the point of union of the cone14. The lower portion of the housing 7 is open to form a downwardlyopening passageway for accommodating the valve 12, and the housing 7 isprovided with a flange 16 bolted or otherwise appropriately clamped to aflange 17 of the air intake chamber 18. The chamber 18 has a lateralport 19 provided with a control valve 20 similar in construction andarrangement to the throttle 8 and appropriately connected by linkage 21for easy and ready manual or foot control of the operator. The airintake chamber 18 may be a casting, or may be otherwise constructed, andis provided with aipendent chamber 22 closed by a web 23 across its topand thus separated from the intake portion of the housing 18. A fuelsupply tube 24 leads from within the chamber 22 to a point just beneaththe valve 12. The lower terminus of the tube 24 is preferably ground toa valve seat 25 adapted to receive the needle valve 26 threaded throughthebottom of the chamber 22. Needle valve 26 is provided with the usualor appropriate gland 27 and with an operating handle 28 accessible fromthe exterior for adjusting the valve 26 relative to its seat 25 forcontrolling the possible quantity of gas or otherfluid to be per mittedto pass up the tube 24. The upper terminus of the tube 24 is round toform a valve seat 29 located and formed to receive the cone 14 as aneedle valve, whereby, when the parts are at rest, the tension of spring13 will cause the valve 12 to remain seated on the seat 29 and shut offall supply of fuel.

A fuel delivery tube 30 leads laterally into the chamber 22, and ispreferably formed into a coil 31 designed to extend the path of travelof the fuel in a relatively short compass of space for facilitatingapplication of heat. A

ther means of insuring an ample discharge through the pipe 33, theintake end of pipe 33,

- that is the end communicating with the manifold 2, may be providedwith an appropriate deflector plate or baflie, such as seen at 38,

to intercept the burnt products advancing along the manifold 2 anddeflect them into the pipe 33. The bafiie 38 may be fixed to the end ofthe pipe 33 in any appropriate manner or, as illustrated, may beproducedby cutting away a portion of the pipe itself and leaving that portionbest located for deflecting the gases into'the intake end of the pipe.

' the air intake chamber, a gaseous fuel cham- What is claiinedis 1 Infuel mixing apparatus wherein vaporized fuel and air are mixed, thecombination of an air intake chamber, amixing chamber above and indirect co unication with the air intake chamber, a gaseous fuel chambercontacting with the air intake chamber and sealed from communicationtherewith, a discharge tube extending upwardly from the gaseous fuelchamber and opening toward the mixing chamber at the place ofcommunication of the air intake chamber with the mixing chamber, thecross sectional area of the discharge tube being relatively small withrespect to that of the gaseous fuel chamber, an imperforate valveextending across and substantially closing the communication between theair intake chamber. and mixing chamber and arranged above the dischargeend of the gaseous fuel discharge tube and having a portion adapted toengage and close said discharge end, and means additional to said valvefor varying the discharge through said tube.

2. In fuel mixing apparatus wherein vaporized fuel and air are mixed,the combinationof an air intake chamber, a mixing chamber above and indirect communication with ber contacting with the air intake chamber andsealed from communication therewith, a discharge tube extending upwardlyfrom the gaseous fuel chamber and opening toward the mixing chamberat-the place of communication of the air intake chamber with the mixingchamber, the cross sectional area of the discharge tube being relativelysmall with respect to that of the gaseous fuel chamber, an imperforatevalve extending across and substantially closing the communicationbetween the air intake chamber and mixing chamberand arranged above thedischarge end of the gaseous fuel discharge tube and having a portionadapted to engage and close said discharge end, and a valve at the lowerend portion ofthe gaseous fuel discharge tube for varying the dischargethrough said tube. In testimony whereof I affix my signature.

' WILLIAM F. FENZEL.

